"Monkey Business" is a 1952 comedy film directed by Howard Hawks and stars Cary Grant, Ginger Rogers, Charles Coburn, and Marilyn Monroe. The story follows a scientist who discovers a youth serum that causes unexpected and humorous consequences when tested on himself and others. The film explores themes of aging and the desire to recapture youth. The plot thickens as the scientist's antics lead to a series of comedic situations, including misunderstandings and romantic entanglements. The film is known for its witty dialogue and physical comedy, showcasing the talents of its cast, particularly Cary Grant and Marilyn Monroe.